Testing 18650 Li-ion Batteries : Brian Dorey.com blog
Ultrafire 18650 Rechargeable Batteries
PSA: This is why you should avoid Ultrafire and sketchy Chinese batteries. There's no protection circuit, despite their claim, and their advertised capacity is 9 times what they're capable of. : r/flashlight
Generic 2 Pieces Ultrafire 3.7vLi-ion Rechargeable Battery price from jumia in Kenya - Yaoota!